Modular multisize bidirection scraping device

A bidirectional scraping device for use in removing material adhering to the inner walls of a pipeline, said device being moved inside the pipeline, in use, by means of the actual flow of the fluid flowing through the pipeline, wherein said device is of modular construction and comprises:

• a plurality of groups of flexible radial scraping bars which are spaced apart and offset angularly so that the bars are able to scrape substantially the entire inner surface of the said pipeline;
• a flexible shaft onto which said plurality of groups of flexible radial scraping bars is assembled;
• and
• at least one flexible sealing module fitted on said flexible shaft, wherein each flexible sealing module had a thin layer of abrasion-resistant elastomeric material coating that surface which comes into direct contact with the inner walls of the pipeline.

A bidirectional scraping device for use in removing material adhering to the inner walls of a pipeline, said device being moved inside the pipeline, in use, by means of the actual flow of the fluid flowing through the pipeline, wherein said device is of modular construction and comprises:

• a plurality of groups of flexible radial scraping bars which are spaced apart and offset angularly so that the bars are able to scrape substantially the entire inner surface of the said pipeline;
• a flexible shaft onto which said plurality of groups of flexible radial scraping bars is assembled;
• and
• at least one flexible sealing module fitted on said flexible shaft, wherein there is a longitudinal movement limiter inside each flexible sealing module in order to ensure it maintains a constant length.

A bidirectional scraping device for use in removing material adhering to the inner walls of a pipeline, said device being moved inside the pipeline, in use, by means of the actual flow of the fluid flowing through the pipeline, wherein said device is of modular construction and comprises:

• a plurality of groups of flexible radial scraping bars which are spaced apart and offset angularly so that the bars are able to scrape substantially the entire inner surface of the said pipeline;
• a flexible shaft onto which said plurality of groups of flexible radial scraping bars is assembled;
• and
• at least one flexible sealing module fitted on said flexible shaft, wherein groups of further flexible radial scraping bars are fitted inside each flexible sealing module to enhance the scraping effect.

A bidirectional scraping device for use in removing material adhering to the inner walls of a pipeline, said device being moved inside the pipeline, in use, by means of the actual flow of the fluid flowing through the pipeline, wherein said device is of modular construction and comprises:

• a plurality of groups of flexible radial scraping bars which are spaced apart and offset angularly so that the bars are able to scrape substantially the entire inner surface of the said pipeline;
• a flexible shaft onto which said plurality of groups of flexible radial scraping bars is assembled;
• and
• at least one flexible sealing module fitted on said flexible shaft, wherein said at least one sealing module comprises a first sealing module fitted at a first end of said flexible shaft, and a second flexible sealing module fitted at a second end of said flexible shaft, said flexible shaft having means for facilitating assembly and means for preventing, after assembly, the occurrence of linear movements between components, wherein said means for facilitating assembly comprise stop discs and spacer discs;
• and
• wherein the means for preventing, after assembly, the occurrence of linear movements between the components comprise a thread at each end of the flexible shaft, and a nut and lock nut which are threaded onto the respective threaded end for exerting compression so as to prevent linear movement of the components relative to said shaft.